Single Email Route

Hi,

I was wonder if anyone has any advice or solution for the below:

I have a situation where we want a single email address in our dns namespace e.g. user@abc.com to be routed to a secondary mail server on our network. The @abc.com portion must be maintained.

I have read a number of article on setting up exchange and other mail server sharing the same namespace,  however I only want a specific email address to be routed, not all addresses not found sent to secondary server.

Thanks in advance.

Peter

Office Server Addict